Cooled rotary electric machine

Abstract

A cooling system for a rotary electric machine having an axis of rotation includes a cooling jacket suitable for receiving a stator of the rotary electrical machine, a housing receiving the cooling jacket, in which an outer wall of the cooling jacket forms, with an inner wall of the housing, a cooling chamber through which a cooling fluid can flow. A separator element separates an inlet zone of the cooling chamber and an outlet zone of the cooling chamber. The separator element includes a fastening part, of a first length, fastened to the outer wall of the cooling jacket or the inner wall of the housing, a first separating part, of a second length, inclined relative to the fastening part and non-parallel to the fastening part. The first length is less than the second length such that the first separating part includes comprises a first free end that is not directly connected to the fastening part. The invention also relates to an electric machine equipped with such a cooling system.

1 . A cooling system for a rotary electric machine having an axis of rotation, comprising:
 a cooling jacket that is able to receive a stator of the rotary electric machine,   a housing receiving the cooling jacket,   wherein an outer wall of the cooling jacket forms, together with an inner wall of the housing, a cooling chamber that is able to be passed through by a cooling fluid,   and wherein the housing comprises an inlet opening for the inlet of the cooling fluid into an inlet zone of the cooling chamber, and an outlet opening for the outlet of the cooling fluid from an outlet zone of the cooling chamber, the inlet opening and the outlet opening being formed in the housing,   and wherein a separating element, which is separate from the cooling jacket and from the housing, is fixed to one of the outer wall of the cooling jacket and the inner wall of the housing in order to separate the inlet zone of the cooling chamber and the outlet zone of the cooling chamber,   the separating element comprising:   aa fixing part, with a first length, having a fixing face with a shape that is complementary to the shape of the one of the outer wall of the cooling jacket and the inner wall of the housing to which the separating element is fixed,   a first separation part, with a second length, that is inclined with respect to the fixing part and not parallel to the fixing part,   the first length being smaller than the second length such that the first separation part comprises a first free end which is not directly connected to the fixing part.   
     
     
         2 . The cooling system as claimed in  claim 1 , wherein the first separation part forms an angle of between 20 degrees and 160 degrees, in particular between 45 degrees and 135 degrees, with the fixing part. 
     
     
         3 . The cooling system as claimed in  claim 1 , wherein the first separation part is formed in continuity of material with the fixing part beyond a first bending zone. 
     
     
         4 . The cooling system as claimed in  claim 1 , wherein the cooling chamber has a shape exhibiting symmetry of revolution whose axis is the axis of rotation, the shape exhibiting symmetry of revolution having a first thickness measured at a first axial end and a second thickness measured at a second axial end, the first thickness being smaller than the second thickness,
 and wherein the first free end is oriented toward the first axial end, another end of the first separation part that is opposite to the free end being oriented toward the second axial end.   
     
     
         5 . The cooling system as claimed in  claim 4 , wherein the separating element is made from a sheet material, in particular of sheet steel. 
     
     
         6 . The cooling system as claimed in  claim 5 , wherein an edge surface of the sheet material of the first free end faces toward the one of the outer wall of the cooling jacket and the inner wall of the housing to which the separating element is fixed. 
     
     
         7 . The cooling system as claimed in  claim 1 , wherein the separating element comprises a second separation part, with a third length, that is inclined with respect to the fixing part and not parallel to the fixing part, the first length being smaller than the third length such that the second separation part comprises a second free end that is not directly connected to the fixing part. 
     
     
         8 . The cooling system as claimed in  claim 7 , wherein the second separation part is formed in continuity of material with the fixing part beyond a second bending zone. 
     
     
         9 . The cooling system as claimed in  claim 1 , wherein the separating element is welded to one of the outer wall of the cooling jacket and the inner wall of the housing. 
     
     
         10 . An electric machine comprising:
 a stator,   a rotor,   a cooling system as claimed in  claim 1 .   
     
     
         11 . The electric machine as claimed in  claim 10 , wherein the stator is mounted by force in the cooling jacket. 
     
     
         12 . The cooling system as claimed in  claim 2 , wherein the first separation part is formed in continuity of material with the fixing part beyond a first bending zone. 
     
     
         13 . The cooling system as claimed in  claim 2 , wherein the cooling chamber has a shape exhibiting symmetry of revolution whose axis is the axis of rotation, the shape exhibiting symmetry of revolution having a first thickness measured at a first axial end and a second thickness measured at a second axial end, the first thickness being smaller than the second thickness,
 and wherein the first free end is oriented toward the first axial end, another end of the first separation part that is opposite to the free end being oriented toward the second axial end.   
     
     
         14 . The cooling system as claimed in  claim 2 , wherein the separating element comprises a second separation part, with a third length, that is inclined with respect to the fixing part and not parallel to the fixing part, the first length being smaller than the third length such that the second separation part comprises a second free end that is not directly connected to the fixing part. 
     
     
         15 . The cooling system as claimed in  claim 2 , wherein the separating element is welded to one of the outer wall of the cooling jacket and the inner wall of the housing. 
     
     
         16 . An electric machine comprising:
 a stator,   a rotor,   
       a cooling system as claimed in  claim 2 . 
     
     
         17 . The cooling system as claimed in  claim 3 , wherein the cooling chamber has a shape exhibiting symmetry of revolution whose axis is the axis of rotation, the shape exhibiting symmetry of revolution having a first thickness measured at a first axial end and a second thickness measured at a second axial end, the first thickness being smaller than the second thickness,
 and wherein the first free end is oriented toward the first axial end, another end of the first separation part that is opposite to the free end being oriented toward the second axial end.   
     
     
         18 . The cooling system as claimed in  claim 3 , wherein the separating element comprises a second separation part, with a third length, that is inclined with respect to the fixing part and not parallel to the fixing part, the first length being smaller than the third length such that the second separation part comprises a second free end that is not directly connected to the fixing part. 
     
     
         19 . The cooling system as claimed in  claim 3 , wherein the separating element is welded to one of the outer wall of the cooling jacket and the inner wall of the housing. 
     
     
         20 . An electric machine comprising:
 a stator,   a rotor,   a cooling system as claimed in  claim 3 .